"The early days of motor travel took place on primitive roads that were littered with stray
horseshoe nails. Punctures (flat tires) were all too common, and required the motorist to remove the wheel from the car, demount the tire, patch the
inner tube, re-mount the tire, inflate the tire, and re-mount the wheel. To alleviate this time-consuming process, Walter and Tom Davies of
Llanelli,
Wales, invented the spare tire in 1904. At the time, motor cars were made without spare wheels.
[5] Their company, Stepney Iron Mongers, had agents distributing the United States, Belgium, France, and Italy.
[6] The word "stepney" is sometimes used interchangeably in countries that were once part of the British Empire such as
Pakistan, Bangladesh,
India, and
Malta [1]
The first to equip cars with an inflated spare wheel-and-tire assembly were the
Ramblers made by Thomas B. Jeffery Company.
[7] The Rambler's interchangeable wheel with a mounted and inflated spare tire meant the motorist could exchange it quickly for the punctured tire that could then be repaired at a more convenient time and place.
[8]
The pre-mounted spare tire and wheel combination proved so popular with motorists that carrying up to two spare tires became common.[
citation needed]
Automakers often equipped cars with one or dual sidemounts. The spares were mounted behind the front fenders as they blended into the running boards (a narrow footboard serving as a step beneath the doors)."
https://en.wikipedia.org/wiki/Spare_tire